package com.itheima.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyuncs.exceptions.ClientException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.util.UUID;

/**
 * 阿里云 OSS 工具类
 */

@Component
//将此工具类作为bean扔进容器里
public class AliOSSUtils {
   @Value("${aliyun.oss.endpoint}")
   private  String endpoint ;
   @Value("${aliyun.oss.bucketName}")
   private  String bucketName ;

   /* @Autowired
    private AliOSSUtils aliOSSUtils ;

    private String endpoint = aliOSSUtils.endpoint;
    private String bucketName = aliOSSUtils.bucketName;*/


    /**
     * 实现上传图片到OSS
     */
    public  String upload(MultipartFile file) throws IOException, ClientException {
        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();

        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        //获取环境变量中的凭证
        EnvironmentVariableCredentialsProvider credentialsProvider =  CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        //上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint,credentialsProvider );
        ossClient.putObject(bucketName, fileName, inputStream);

        //文件访问路径
        String url = endpoint.split("//")[0] + "//" + bucketName + "." +
                endpoint.split("//")[1] + "/" + fileName;
        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }

}
